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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it<a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by<a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or<a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but<a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY<a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public<a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,<a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.<a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. <a name="line.24"></a>
<span class="sourceLineNo">025</span> * Other names may be trademarks of their respective owners.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * ---------------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * ServletUtilities.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * ---------------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C) Copyright 2002-2008, by Richard Atkinson and Contributors.<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  Richard Atkinson;<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   J?rgen Hoffman;<a name="line.33"></a>
<span class="sourceLineNo">034</span> *                   David Gilbert (for Object Refinery Limited);<a name="line.34"></a>
<span class="sourceLineNo">035</span> *                   Douglas Clayton;<a name="line.35"></a>
<span class="sourceLineNo">036</span> *<a name="line.36"></a>
<span class="sourceLineNo">037</span> * Changes<a name="line.37"></a>
<span class="sourceLineNo">038</span> * -------<a name="line.38"></a>
<span class="sourceLineNo">039</span> * 19-Aug-2002 : Version 1;<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 20-Apr-2003 : Added additional sendTempFile method to allow MIME type<a name="line.40"></a>
<span class="sourceLineNo">041</span> *               specification and modified original sendTempFile method to<a name="line.41"></a>
<span class="sourceLineNo">042</span> *               automatically set MIME type for JPEG and PNG files<a name="line.42"></a>
<span class="sourceLineNo">043</span> * 23-Jun-2003 : Added additional sendTempFile method at the request of<a name="line.43"></a>
<span class="sourceLineNo">044</span> *               J?rgen Hoffman;<a name="line.44"></a>
<span class="sourceLineNo">045</span> * 07-Jul-2003 : Added more header information to streamed images;<a name="line.45"></a>
<span class="sourceLineNo">046</span> * 19-Aug-2003 : Forced images to be stored in the temporary directory defined<a name="line.46"></a>
<span class="sourceLineNo">047</span> *               by System property java.io.tmpdir, rather than default (RA);<a name="line.47"></a>
<span class="sourceLineNo">048</span> * 24-Mar-2004 : Added temp filename prefix attribute (DG);<a name="line.48"></a>
<span class="sourceLineNo">049</span> * 09-Mar-2005 : Added "one time" file option (DG);<a name="line.49"></a>
<span class="sourceLineNo">050</span> * ------------- JFREECHART 1.0.x RELEASED ------------------------------------<a name="line.50"></a>
<span class="sourceLineNo">051</span> * 10-Jan-2006 : Updated API docs and reformatted (DG);<a name="line.51"></a>
<span class="sourceLineNo">052</span> * 13-Sep-2006 : Format date in response header in English, not locale default<a name="line.52"></a>
<span class="sourceLineNo">053</span> *               (see bug 1557141) (DG);<a name="line.53"></a>
<span class="sourceLineNo">054</span> *<a name="line.54"></a>
<span class="sourceLineNo">055</span> */<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>package org.jfree.chart.servlet;<a name="line.57"></a>
<span class="sourceLineNo">058</span><a name="line.58"></a>
<span class="sourceLineNo">059</span>import java.io.BufferedInputStream;<a name="line.59"></a>
<span class="sourceLineNo">060</span>import java.io.BufferedOutputStream;<a name="line.60"></a>
<span class="sourceLineNo">061</span>import java.io.File;<a name="line.61"></a>
<span class="sourceLineNo">062</span>import java.io.FileInputStream;<a name="line.62"></a>
<span class="sourceLineNo">063</span>import java.io.FileNotFoundException;<a name="line.63"></a>
<span class="sourceLineNo">064</span>import java.io.IOException;<a name="line.64"></a>
<span class="sourceLineNo">065</span>import java.text.SimpleDateFormat;<a name="line.65"></a>
<span class="sourceLineNo">066</span>import java.util.Date;<a name="line.66"></a>
<span class="sourceLineNo">067</span>import java.util.Locale;<a name="line.67"></a>
<span class="sourceLineNo">068</span>import java.util.TimeZone;<a name="line.68"></a>
<span class="sourceLineNo">069</span><a name="line.69"></a>
<span class="sourceLineNo">070</span>import javax.servlet.http.HttpServletResponse;<a name="line.70"></a>
<span class="sourceLineNo">071</span>import javax.servlet.http.HttpSession;<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>import org.jfree.chart.ChartRenderingInfo;<a name="line.73"></a>
<span class="sourceLineNo">074</span>import org.jfree.chart.ChartUtilities;<a name="line.74"></a>
<span class="sourceLineNo">075</span>import org.jfree.chart.JFreeChart;<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>/**<a name="line.77"></a>
<span class="sourceLineNo">078</span> * Utility class used for servlet related JFreeChart operations.<a name="line.78"></a>
<span class="sourceLineNo">079</span> */<a name="line.79"></a>
<span class="sourceLineNo">080</span>public class ServletUtilities {<a name="line.80"></a>
<span class="sourceLineNo">081</span><a name="line.81"></a>
<span class="sourceLineNo">082</span>    /** The filename prefix. */<a name="line.82"></a>
<span class="sourceLineNo">083</span>    private static String tempFilePrefix = "jfreechart-";<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>
<span class="sourceLineNo">085</span>    /** A prefix for "one time" charts. */<a name="line.85"></a>
<span class="sourceLineNo">086</span>    private static String tempOneTimeFilePrefix = "jfreechart-onetime-";<a name="line.86"></a>
<span class="sourceLineNo">087</span><a name="line.87"></a>
<span class="sourceLineNo">088</span>    /**<a name="line.88"></a>
<span class="sourceLineNo">089</span>     * Returns the prefix for the temporary file names generated by this class.<a name="line.89"></a>
<span class="sourceLineNo">090</span>     *<a name="line.90"></a>
<span class="sourceLineNo">091</span>     * @return The prefix (never &lt;code&gt;null&lt;/code&gt;).<a name="line.91"></a>
<span class="sourceLineNo">092</span>     */<a name="line.92"></a>
<span class="sourceLineNo">093</span>    public static String getTempFilePrefix() {<a name="line.93"></a>
<span class="sourceLineNo">094</span>        return ServletUtilities.tempFilePrefix;<a name="line.94"></a>
<span class="sourceLineNo">095</span>    }<a name="line.95"></a>
<span class="sourceLineNo">096</span><a name="line.96"></a>
<span class="sourceLineNo">097</span>    /**<a name="line.97"></a>
<span class="sourceLineNo">098</span>     * Sets the prefix for the temporary file names generated by this class.<a name="line.98"></a>
<span class="sourceLineNo">099</span>     *<a name="line.99"></a>
<span class="sourceLineNo">100</span>     * @param prefix  the prefix (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.100"></a>
<span class="sourceLineNo">101</span>     */<a name="line.101"></a>
<span class="sourceLineNo">102</span>    public static void setTempFilePrefix(String prefix) {<a name="line.102"></a>
<span class="sourceLineNo">103</span>        if (prefix == null) {<a name="line.103"></a>
<span class="sourceLineNo">104</span>            throw new IllegalArgumentException("Null 'prefix' argument.");<a name="line.104"></a>
<span class="sourceLineNo">105</span>        }<a name="line.105"></a>
<span class="sourceLineNo">106</span>        ServletUtilities.tempFilePrefix = prefix;<a name="line.106"></a>
<span class="sourceLineNo">107</span>    }<a name="line.107"></a>
<span class="sourceLineNo">108</span><a name="line.108"></a>
<span class="sourceLineNo">109</span>    /**<a name="line.109"></a>
<span class="sourceLineNo">110</span>     * Returns the prefix for "one time" temporary file names generated by<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * this class.<a name="line.111"></a>
<span class="sourceLineNo">112</span>     *<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * @return The prefix.<a name="line.113"></a>
<span class="sourceLineNo">114</span>     */<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public static String getTempOneTimeFilePrefix() {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        return ServletUtilities.tempOneTimeFilePrefix;<a name="line.116"></a>
<span class="sourceLineNo">117</span>    }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>    /**<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * Sets the prefix for the "one time" temporary file names generated by<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * this class.<a name="line.121"></a>
<span class="sourceLineNo">122</span>     *<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * @param prefix  the prefix (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.123"></a>
<span class="sourceLineNo">124</span>     */<a name="line.124"></a>
<span class="sourceLineNo">125</span>    public static void setTempOneTimeFilePrefix(String prefix) {<a name="line.125"></a>
<span class="sourceLineNo">126</span>        if (prefix == null) {<a name="line.126"></a>
<span class="sourceLineNo">127</span>            throw new IllegalArgumentException("Null 'prefix' argument.");<a name="line.127"></a>
<span class="sourceLineNo">128</span>        }<a name="line.128"></a>
<span class="sourceLineNo">129</span>        ServletUtilities.tempOneTimeFilePrefix = prefix;<a name="line.129"></a>
<span class="sourceLineNo">130</span>    }<a name="line.130"></a>
<span class="sourceLineNo">131</span><a name="line.131"></a>
<span class="sourceLineNo">132</span>    /**<a name="line.132"></a>
<span class="sourceLineNo">133</span>     * Saves the chart as a PNG format file in the temporary directory.<a name="line.133"></a>
<span class="sourceLineNo">134</span>     *<a name="line.134"></a>
<span class="sourceLineNo">135</span>     * @param chart  the JFreeChart to be saved.<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * @param width  the width of the chart.<a name="line.136"></a>
<span class="sourceLineNo">137</span>     * @param height  the height of the chart.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * @param session  the HttpSession of the client (if &lt;code&gt;null&lt;/code&gt;, the<a name="line.138"></a>
<span class="sourceLineNo">139</span>     *                 temporary file is marked as "one-time" and deleted by<a name="line.139"></a>
<span class="sourceLineNo">140</span>     *                 the {@link DisplayChart} servlet right after it is<a name="line.140"></a>
<span class="sourceLineNo">141</span>     *                 streamed to the client).<a name="line.141"></a>
<span class="sourceLineNo">142</span>     *<a name="line.142"></a>
<span class="sourceLineNo">143</span>     * @return The filename of the chart saved in the temporary directory.<a name="line.143"></a>
<span class="sourceLineNo">144</span>     *<a name="line.144"></a>
<span class="sourceLineNo">145</span>     * @throws IOException if there is a problem saving the file.<a name="line.145"></a>
<span class="sourceLineNo">146</span>     */<a name="line.146"></a>
<span class="sourceLineNo">147</span>    public static String saveChartAsPNG(JFreeChart chart, int width, int height,<a name="line.147"></a>
<span class="sourceLineNo">148</span>            HttpSession session) throws IOException {<a name="line.148"></a>
<span class="sourceLineNo">149</span><a name="line.149"></a>
<span class="sourceLineNo">150</span>        return ServletUtilities.saveChartAsPNG(chart, width, height, null,<a name="line.150"></a>
<span class="sourceLineNo">151</span>                session);<a name="line.151"></a>
<span class="sourceLineNo">152</span><a name="line.152"></a>
<span class="sourceLineNo">153</span>    }<a name="line.153"></a>
<span class="sourceLineNo">154</span><a name="line.154"></a>
<span class="sourceLineNo">155</span>    /**<a name="line.155"></a>
<span class="sourceLineNo">156</span>     * Saves the chart as a PNG format file in the temporary directory and<a name="line.156"></a>
<span class="sourceLineNo">157</span>     * populates the {@link ChartRenderingInfo} object which can be used to<a name="line.157"></a>
<span class="sourceLineNo">158</span>     * generate an HTML image map.<a name="line.158"></a>
<span class="sourceLineNo">159</span>     *<a name="line.159"></a>
<span class="sourceLineNo">160</span>     * @param chart  the chart to be saved (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.160"></a>
<span class="sourceLineNo">161</span>     * @param width  the width of the chart.<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * @param height  the height of the chart.<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * @param info  the ChartRenderingInfo object to be populated<a name="line.163"></a>
<span class="sourceLineNo">164</span>     *              (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @param session  the HttpSession of the client (if &lt;code&gt;null&lt;/code&gt;, the<a name="line.165"></a>
<span class="sourceLineNo">166</span>     *                 temporary file is marked as "one-time" and deleted by<a name="line.166"></a>
<span class="sourceLineNo">167</span>     *                 the {@link DisplayChart} servlet right after it is<a name="line.167"></a>
<span class="sourceLineNo">168</span>     *                 streamed to the client).<a name="line.168"></a>
<span class="sourceLineNo">169</span>     *<a name="line.169"></a>
<span class="sourceLineNo">170</span>     * @return The filename of the chart saved in the temporary directory.<a name="line.170"></a>
<span class="sourceLineNo">171</span>     *<a name="line.171"></a>
<span class="sourceLineNo">172</span>     * @throws IOException if there is a problem saving the file.<a name="line.172"></a>
<span class="sourceLineNo">173</span>     */<a name="line.173"></a>
<span class="sourceLineNo">174</span>    public static String saveChartAsPNG(JFreeChart chart, int width, int height,<a name="line.174"></a>
<span class="sourceLineNo">175</span>            ChartRenderingInfo info, HttpSession session) throws IOException {<a name="line.175"></a>
<span class="sourceLineNo">176</span><a name="line.176"></a>
<span class="sourceLineNo">177</span>        if (chart == null) {<a name="line.177"></a>
<span class="sourceLineNo">178</span>            throw new IllegalArgumentException("Null 'chart' argument.");<a name="line.178"></a>
<span class="sourceLineNo">179</span>        }<a name="line.179"></a>
<span class="sourceLineNo">180</span>        ServletUtilities.createTempDir();<a name="line.180"></a>
<span class="sourceLineNo">181</span>        String prefix = ServletUtilities.tempFilePrefix;<a name="line.181"></a>
<span class="sourceLineNo">182</span>        if (session == null) {<a name="line.182"></a>
<span class="sourceLineNo">183</span>            prefix = ServletUtilities.tempOneTimeFilePrefix;<a name="line.183"></a>
<span class="sourceLineNo">184</span>        }<a name="line.184"></a>
<span class="sourceLineNo">185</span>        File tempFile = File.createTempFile(prefix, ".png",<a name="line.185"></a>
<span class="sourceLineNo">186</span>                new File(System.getProperty("java.io.tmpdir")));<a name="line.186"></a>
<span class="sourceLineNo">187</span>        ChartUtilities.saveChartAsPNG(tempFile, chart, width, height, info);<a name="line.187"></a>
<span class="sourceLineNo">188</span>        if (session != null) {<a name="line.188"></a>
<span class="sourceLineNo">189</span>            ServletUtilities.registerChartForDeletion(tempFile, session);<a name="line.189"></a>
<span class="sourceLineNo">190</span>        }<a name="line.190"></a>
<span class="sourceLineNo">191</span>        return tempFile.getName();<a name="line.191"></a>
<span class="sourceLineNo">192</span><a name="line.192"></a>
<span class="sourceLineNo">193</span>    }<a name="line.193"></a>
<span class="sourceLineNo">194</span><a name="line.194"></a>
<span class="sourceLineNo">195</span>    /**<a name="line.195"></a>
<span class="sourceLineNo">196</span>     * Saves the chart as a JPEG format file in the temporary directory.<a name="line.196"></a>
<span class="sourceLineNo">197</span>     * &lt;p&gt;<a name="line.197"></a>
<span class="sourceLineNo">198</span>     * SPECIAL NOTE: Please avoid using JPEG as an image format for charts,<a name="line.198"></a>
<span class="sourceLineNo">199</span>     * it is a "lossy" format that introduces visible distortions in the<a name="line.199"></a>
<span class="sourceLineNo">200</span>     * resulting image - use PNG instead.  In addition, note that JPEG output<a name="line.200"></a>
<span class="sourceLineNo">201</span>     * is supported by JFreeChart only for JRE 1.4.2 or later.<a name="line.201"></a>
<span class="sourceLineNo">202</span>     *<a name="line.202"></a>
<span class="sourceLineNo">203</span>     * @param chart  the JFreeChart to be saved.<a name="line.203"></a>
<span class="sourceLineNo">204</span>     * @param width  the width of the chart.<a name="line.204"></a>
<span class="sourceLineNo">205</span>     * @param height  the height of the chart.<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * @param session  the HttpSession of the client (if &lt;code&gt;null&lt;/code&gt;, the<a name="line.206"></a>
<span class="sourceLineNo">207</span>     *                 temporary file is marked as "one-time" and deleted by<a name="line.207"></a>
<span class="sourceLineNo">208</span>     *                 the {@link DisplayChart} servlet right after it is<a name="line.208"></a>
<span class="sourceLineNo">209</span>     *                 streamed to the client).<a name="line.209"></a>
<span class="sourceLineNo">210</span>     *<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * @return The filename of the chart saved in the temporary directory.<a name="line.211"></a>
<span class="sourceLineNo">212</span>     *<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * @throws IOException if there is a problem saving the file.<a name="line.213"></a>
<span class="sourceLineNo">214</span>     */<a name="line.214"></a>
<span class="sourceLineNo">215</span>    public static String saveChartAsJPEG(JFreeChart chart, int width,<a name="line.215"></a>
<span class="sourceLineNo">216</span>                                         int height, HttpSession session)<a name="line.216"></a>
<span class="sourceLineNo">217</span>            throws IOException {<a name="line.217"></a>
<span class="sourceLineNo">218</span><a name="line.218"></a>
<span class="sourceLineNo">219</span>        return ServletUtilities.saveChartAsJPEG(chart, width, height, null,<a name="line.219"></a>
<span class="sourceLineNo">220</span>                session);<a name="line.220"></a>
<span class="sourceLineNo">221</span><a name="line.221"></a>
<span class="sourceLineNo">222</span>    }<a name="line.222"></a>
<span class="sourceLineNo">223</span><a name="line.223"></a>
<span class="sourceLineNo">224</span>    /**<a name="line.224"></a>
<span class="sourceLineNo">225</span>     * Saves the chart as a JPEG format file in the temporary directory and<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * populates the &lt;code&gt;ChartRenderingInfo&lt;/code&gt; object which can be used<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * to generate an HTML image map.<a name="line.227"></a>
<span class="sourceLineNo">228</span>     * &lt;p&gt;<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * SPECIAL NOTE: Please avoid using JPEG as an image format for charts,<a name="line.229"></a>
<span class="sourceLineNo">230</span>     * it is a "lossy" format that introduces visible distortions in the<a name="line.230"></a>
<span class="sourceLineNo">231</span>     * resulting image - use PNG instead.  In addition, note that JPEG output<a name="line.231"></a>
<span class="sourceLineNo">232</span>     * is supported by JFreeChart only for JRE 1.4.2 or later.<a name="line.232"></a>
<span class="sourceLineNo">233</span>     *<a name="line.233"></a>
<span class="sourceLineNo">234</span>     * @param chart  the chart to be saved (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.234"></a>
<span class="sourceLineNo">235</span>     * @param width  the width of the chart<a name="line.235"></a>
<span class="sourceLineNo">236</span>     * @param height  the height of the chart<a name="line.236"></a>
<span class="sourceLineNo">237</span>     * @param info  the ChartRenderingInfo object to be populated<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * @param session  the HttpSession of the client (if &lt;code&gt;null&lt;/code&gt;, the<a name="line.238"></a>
<span class="sourceLineNo">239</span>     *                 temporary file is marked as "one-time" and deleted by<a name="line.239"></a>
<span class="sourceLineNo">240</span>     *                 the {@link DisplayChart} servlet right after it is<a name="line.240"></a>
<span class="sourceLineNo">241</span>     *                 streamed to the client).<a name="line.241"></a>
<span class="sourceLineNo">242</span>     *<a name="line.242"></a>
<span class="sourceLineNo">243</span>     * @return The filename of the chart saved in the temporary directory<a name="line.243"></a>
<span class="sourceLineNo">244</span>     *<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * @throws IOException if there is a problem saving the file.<a name="line.245"></a>
<span class="sourceLineNo">246</span>     */<a name="line.246"></a>
<span class="sourceLineNo">247</span>    public static String saveChartAsJPEG(JFreeChart chart, int width,<a name="line.247"></a>
<span class="sourceLineNo">248</span>            int height, ChartRenderingInfo info, HttpSession session)<a name="line.248"></a>
<span class="sourceLineNo">249</span>            throws IOException {<a name="line.249"></a>
<span class="sourceLineNo">250</span><a name="line.250"></a>
<span class="sourceLineNo">251</span>        if (chart == null) {<a name="line.251"></a>
<span class="sourceLineNo">252</span>            throw new IllegalArgumentException("Null 'chart' argument.");<a name="line.252"></a>
<span class="sourceLineNo">253</span>        }<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span>        ServletUtilities.createTempDir();<a name="line.255"></a>
<span class="sourceLineNo">256</span>        String prefix = ServletUtilities.tempFilePrefix;<a name="line.256"></a>
<span class="sourceLineNo">257</span>        if (session == null) {<a name="line.257"></a>
<span class="sourceLineNo">258</span>            prefix = ServletUtilities.tempOneTimeFilePrefix;<a name="line.258"></a>
<span class="sourceLineNo">259</span>        }<a name="line.259"></a>
<span class="sourceLineNo">260</span>        File tempFile = File.createTempFile(prefix, ".jpeg",<a name="line.260"></a>
<span class="sourceLineNo">261</span>                new File(System.getProperty("java.io.tmpdir")));<a name="line.261"></a>
<span class="sourceLineNo">262</span>        ChartUtilities.saveChartAsJPEG(tempFile, chart, width, height, info);<a name="line.262"></a>
<span class="sourceLineNo">263</span>        if (session != null) {<a name="line.263"></a>
<span class="sourceLineNo">264</span>            ServletUtilities.registerChartForDeletion(tempFile, session);<a name="line.264"></a>
<span class="sourceLineNo">265</span>        }<a name="line.265"></a>
<span class="sourceLineNo">266</span>        return tempFile.getName();<a name="line.266"></a>
<span class="sourceLineNo">267</span><a name="line.267"></a>
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<span class="sourceLineNo">269</span><a name="line.269"></a>
<span class="sourceLineNo">270</span>    /**<a name="line.270"></a>
<span class="sourceLineNo">271</span>     * Creates the temporary directory if it does not exist.  Throws a<a name="line.271"></a>
<span class="sourceLineNo">272</span>     * &lt;code&gt;RuntimeException&lt;/code&gt; if the temporary directory is<a name="line.272"></a>
<span class="sourceLineNo">273</span>     * &lt;code&gt;null&lt;/code&gt;.  Uses the system property &lt;code&gt;java.io.tmpdir&lt;/code&gt;<a name="line.273"></a>
<span class="sourceLineNo">274</span>     * as the temporary directory.  This sounds like a strange thing to do but<a name="line.274"></a>
<span class="sourceLineNo">275</span>     * my temporary directory was not created on my default Tomcat 4.0.3<a name="line.275"></a>
<span class="sourceLineNo">276</span>     * installation.  Could save some questions on the forum if it is created<a name="line.276"></a>
<span class="sourceLineNo">277</span>     * when not present.<a name="line.277"></a>
<span class="sourceLineNo">278</span>     */<a name="line.278"></a>
<span class="sourceLineNo">279</span>    protected static void createTempDir() {<a name="line.279"></a>
<span class="sourceLineNo">280</span>        String tempDirName = System.getProperty("java.io.tmpdir");<a name="line.280"></a>
<span class="sourceLineNo">281</span>        if (tempDirName == null) {<a name="line.281"></a>
<span class="sourceLineNo">282</span>            throw new RuntimeException("Temporary directory system property "<a name="line.282"></a>
<span class="sourceLineNo">283</span>                    + "(java.io.tmpdir) is null.");<a name="line.283"></a>
<span class="sourceLineNo">284</span>        }<a name="line.284"></a>
<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span>        // create the temporary directory if it doesn't exist<a name="line.286"></a>
<span class="sourceLineNo">287</span>        File tempDir = new File(tempDirName);<a name="line.287"></a>
<span class="sourceLineNo">288</span>        if (!tempDir.exists()) {<a name="line.288"></a>
<span class="sourceLineNo">289</span>            tempDir.mkdirs();<a name="line.289"></a>
<span class="sourceLineNo">290</span>        }<a name="line.290"></a>
<span class="sourceLineNo">291</span>    }<a name="line.291"></a>
<span class="sourceLineNo">292</span><a name="line.292"></a>
<span class="sourceLineNo">293</span>    /**<a name="line.293"></a>
<span class="sourceLineNo">294</span>     * Adds a {@link ChartDeleter} object to the session object with the name<a name="line.294"></a>
<span class="sourceLineNo">295</span>     * &lt;code&gt;JFreeChart_Deleter&lt;/code&gt; if there is not already one bound to the<a name="line.295"></a>
<span class="sourceLineNo">296</span>     * session and adds the filename to the list of charts to be deleted.<a name="line.296"></a>
<span class="sourceLineNo">297</span>     *<a name="line.297"></a>
<span class="sourceLineNo">298</span>     * @param tempFile  the file to be deleted.<a name="line.298"></a>
<span class="sourceLineNo">299</span>     * @param session  the HTTP session of the client.<a name="line.299"></a>
<span class="sourceLineNo">300</span>     */<a name="line.300"></a>
<span class="sourceLineNo">301</span>    protected static void registerChartForDeletion(File tempFile,<a name="line.301"></a>
<span class="sourceLineNo">302</span>            HttpSession session) {<a name="line.302"></a>
<span class="sourceLineNo">303</span><a name="line.303"></a>
<span class="sourceLineNo">304</span>        //  Add chart to deletion list in session<a name="line.304"></a>
<span class="sourceLineNo">305</span>        if (session != null) {<a name="line.305"></a>
<span class="sourceLineNo">306</span>            ChartDeleter chartDeleter<a name="line.306"></a>
<span class="sourceLineNo">307</span>                = (ChartDeleter) session.getAttribute("JFreeChart_Deleter");<a name="line.307"></a>
<span class="sourceLineNo">308</span>            if (chartDeleter == null) {<a name="line.308"></a>
<span class="sourceLineNo">309</span>                chartDeleter = new ChartDeleter();<a name="line.309"></a>
<span class="sourceLineNo">310</span>                session.setAttribute("JFreeChart_Deleter", chartDeleter);<a name="line.310"></a>
<span class="sourceLineNo">311</span>            }<a name="line.311"></a>
<span class="sourceLineNo">312</span>            chartDeleter.addChart(tempFile.getName());<a name="line.312"></a>
<span class="sourceLineNo">313</span>        }<a name="line.313"></a>
<span class="sourceLineNo">314</span>        else {<a name="line.314"></a>
<span class="sourceLineNo">315</span>            System.out.println("Session is null - chart will not be deleted");<a name="line.315"></a>
<span class="sourceLineNo">316</span>        }<a name="line.316"></a>
<span class="sourceLineNo">317</span>    }<a name="line.317"></a>
<span class="sourceLineNo">318</span><a name="line.318"></a>
<span class="sourceLineNo">319</span>    /**<a name="line.319"></a>
<span class="sourceLineNo">320</span>     * Binary streams the specified file in the temporary directory to the<a name="line.320"></a>
<span class="sourceLineNo">321</span>     * HTTP response in 1KB chunks.<a name="line.321"></a>
<span class="sourceLineNo">322</span>     *<a name="line.322"></a>
<span class="sourceLineNo">323</span>     * @param filename  the name of the file in the temporary directory.<a name="line.323"></a>
<span class="sourceLineNo">324</span>     * @param response  the HTTP response object.<a name="line.324"></a>
<span class="sourceLineNo">325</span>     *<a name="line.325"></a>
<span class="sourceLineNo">326</span>     * @throws IOException  if there is an I/O problem.<a name="line.326"></a>
<span class="sourceLineNo">327</span>     */<a name="line.327"></a>
<span class="sourceLineNo">328</span>    public static void sendTempFile(String filename,<a name="line.328"></a>
<span class="sourceLineNo">329</span>            HttpServletResponse response) throws IOException {<a name="line.329"></a>
<span class="sourceLineNo">330</span><a name="line.330"></a>
<span class="sourceLineNo">331</span>        File file = new File(System.getProperty("java.io.tmpdir"), filename);<a name="line.331"></a>
<span class="sourceLineNo">332</span>        ServletUtilities.sendTempFile(file, response);<a name="line.332"></a>
<span class="sourceLineNo">333</span>    }<a name="line.333"></a>
<span class="sourceLineNo">334</span><a name="line.334"></a>
<span class="sourceLineNo">335</span>    /**<a name="line.335"></a>
<span class="sourceLineNo">336</span>     * Binary streams the specified file to the HTTP response in 1KB chunks.<a name="line.336"></a>
<span class="sourceLineNo">337</span>     *<a name="line.337"></a>
<span class="sourceLineNo">338</span>     * @param file  the file to be streamed.<a name="line.338"></a>
<span class="sourceLineNo">339</span>     * @param response  the HTTP response object.<a name="line.339"></a>
<span class="sourceLineNo">340</span>     *<a name="line.340"></a>
<span class="sourceLineNo">341</span>     * @throws IOException if there is an I/O problem.<a name="line.341"></a>
<span class="sourceLineNo">342</span>     */<a name="line.342"></a>
<span class="sourceLineNo">343</span>    public static void sendTempFile(File file, HttpServletResponse response)<a name="line.343"></a>
<span class="sourceLineNo">344</span>            throws IOException {<a name="line.344"></a>
<span class="sourceLineNo">345</span><a name="line.345"></a>
<span class="sourceLineNo">346</span>        String mimeType = null;<a name="line.346"></a>
<span class="sourceLineNo">347</span>        String filename = file.getName();<a name="line.347"></a>
<span class="sourceLineNo">348</span>        if (filename.length() &gt; 5) {<a name="line.348"></a>
<span class="sourceLineNo">349</span>            if (filename.substring(filename.length() - 5,<a name="line.349"></a>
<span class="sourceLineNo">350</span>                    filename.length()).equals(".jpeg")) {<a name="line.350"></a>
<span class="sourceLineNo">351</span>                mimeType = "image/jpeg";<a name="line.351"></a>
<span class="sourceLineNo">352</span>            }<a name="line.352"></a>
<span class="sourceLineNo">353</span>            else if (filename.substring(filename.length() - 4,<a name="line.353"></a>
<span class="sourceLineNo">354</span>                    filename.length()).equals(".png")) {<a name="line.354"></a>
<span class="sourceLineNo">355</span>                mimeType = "image/png";<a name="line.355"></a>
<span class="sourceLineNo">356</span>            }<a name="line.356"></a>
<span class="sourceLineNo">357</span>        }<a name="line.357"></a>
<span class="sourceLineNo">358</span>        ServletUtilities.sendTempFile(file, response, mimeType);<a name="line.358"></a>
<span class="sourceLineNo">359</span>    }<a name="line.359"></a>
<span class="sourceLineNo">360</span><a name="line.360"></a>
<span class="sourceLineNo">361</span>    /**<a name="line.361"></a>
<span class="sourceLineNo">362</span>     * Binary streams the specified file to the HTTP response in 1KB chunks.<a name="line.362"></a>
<span class="sourceLineNo">363</span>     *<a name="line.363"></a>
<span class="sourceLineNo">364</span>     * @param file  the file to be streamed.<a name="line.364"></a>
<span class="sourceLineNo">365</span>     * @param response  the HTTP response object.<a name="line.365"></a>
<span class="sourceLineNo">366</span>     * @param mimeType  the mime type of the file, null allowed.<a name="line.366"></a>
<span class="sourceLineNo">367</span>     *<a name="line.367"></a>
<span class="sourceLineNo">368</span>     * @throws IOException if there is an I/O problem.<a name="line.368"></a>
<span class="sourceLineNo">369</span>     */<a name="line.369"></a>
<span class="sourceLineNo">370</span>    public static void sendTempFile(File file, HttpServletResponse response,<a name="line.370"></a>
<span class="sourceLineNo">371</span>                                    String mimeType) throws IOException {<a name="line.371"></a>
<span class="sourceLineNo">372</span><a name="line.372"></a>
<span class="sourceLineNo">373</span>        if (file.exists()) {<a name="line.373"></a>
<span class="sourceLineNo">374</span>            BufferedInputStream bis = new BufferedInputStream(<a name="line.374"></a>
<span class="sourceLineNo">375</span>                    new FileInputStream(file));<a name="line.375"></a>
<span class="sourceLineNo">376</span><a name="line.376"></a>
<span class="sourceLineNo">377</span>            //  Set HTTP headers<a name="line.377"></a>
<span class="sourceLineNo">378</span>            if (mimeType != null) {<a name="line.378"></a>
<span class="sourceLineNo">379</span>                response.setHeader("Content-Type", mimeType);<a name="line.379"></a>
<span class="sourceLineNo">380</span>            }<a name="line.380"></a>
<span class="sourceLineNo">381</span>            response.setHeader("Content-Length", String.valueOf(file.length()));<a name="line.381"></a>
<span class="sourceLineNo">382</span>            SimpleDateFormat sdf = new SimpleDateFormat(<a name="line.382"></a>
<span class="sourceLineNo">383</span>                    "EEE, dd MMM yyyy HH:mm:ss z", Locale.ENGLISH);<a name="line.383"></a>
<span class="sourceLineNo">384</span>            sdf.setTimeZone(TimeZone.getTimeZone("GMT"));<a name="line.384"></a>
<span class="sourceLineNo">385</span>            response.setHeader("Last-Modified",<a name="line.385"></a>
<span class="sourceLineNo">386</span>                    sdf.format(new Date(file.lastModified())));<a name="line.386"></a>
<span class="sourceLineNo">387</span><a name="line.387"></a>
<span class="sourceLineNo">388</span>            BufferedOutputStream bos = new BufferedOutputStream(<a name="line.388"></a>
<span class="sourceLineNo">389</span>                    response.getOutputStream());<a name="line.389"></a>
<span class="sourceLineNo">390</span>            byte[] input = new byte[1024];<a name="line.390"></a>
<span class="sourceLineNo">391</span>            boolean eof = false;<a name="line.391"></a>
<span class="sourceLineNo">392</span>            while (!eof) {<a name="line.392"></a>
<span class="sourceLineNo">393</span>                int length = bis.read(input);<a name="line.393"></a>
<span class="sourceLineNo">394</span>                if (length == -1) {<a name="line.394"></a>
<span class="sourceLineNo">395</span>                    eof = true;<a name="line.395"></a>
<span class="sourceLineNo">396</span>                }<a name="line.396"></a>
<span class="sourceLineNo">397</span>                else {<a name="line.397"></a>
<span class="sourceLineNo">398</span>                    bos.write(input, 0, length);<a name="line.398"></a>
<span class="sourceLineNo">399</span>                }<a name="line.399"></a>
<span class="sourceLineNo">400</span>            }<a name="line.400"></a>
<span class="sourceLineNo">401</span>            bos.flush();<a name="line.401"></a>
<span class="sourceLineNo">402</span>            bis.close();<a name="line.402"></a>
<span class="sourceLineNo">403</span>            bos.close();<a name="line.403"></a>
<span class="sourceLineNo">404</span>        }<a name="line.404"></a>
<span class="sourceLineNo">405</span>        else {<a name="line.405"></a>
<span class="sourceLineNo">406</span>            throw new FileNotFoundException(file.getAbsolutePath());<a name="line.406"></a>
<span class="sourceLineNo">407</span>        }<a name="line.407"></a>
<span class="sourceLineNo">408</span>        return;<a name="line.408"></a>
<span class="sourceLineNo">409</span>    }<a name="line.409"></a>
<span class="sourceLineNo">410</span><a name="line.410"></a>
<span class="sourceLineNo">411</span>    /**<a name="line.411"></a>
<span class="sourceLineNo">412</span>     * Perform a search/replace operation on a String<a name="line.412"></a>
<span class="sourceLineNo">413</span>     * There are String methods to do this since (JDK 1.4)<a name="line.413"></a>
<span class="sourceLineNo">414</span>     *<a name="line.414"></a>
<span class="sourceLineNo">415</span>     * @param inputString  the String to have the search/replace operation.<a name="line.415"></a>
<span class="sourceLineNo">416</span>     * @param searchString  the search String.<a name="line.416"></a>
<span class="sourceLineNo">417</span>     * @param replaceString  the replace String.<a name="line.417"></a>
<span class="sourceLineNo">418</span>     *<a name="line.418"></a>
<span class="sourceLineNo">419</span>     * @return The String with the replacements made.<a name="line.419"></a>
<span class="sourceLineNo">420</span>     */<a name="line.420"></a>
<span class="sourceLineNo">421</span>    public static String searchReplace(String inputString,<a name="line.421"></a>
<span class="sourceLineNo">422</span>                                       String searchString,<a name="line.422"></a>
<span class="sourceLineNo">423</span>                                       String replaceString) {<a name="line.423"></a>
<span class="sourceLineNo">424</span><a name="line.424"></a>
<span class="sourceLineNo">425</span>        int i = inputString.indexOf(searchString);<a name="line.425"></a>
<span class="sourceLineNo">426</span>        if (i == -1) {<a name="line.426"></a>
<span class="sourceLineNo">427</span>            return inputString;<a name="line.427"></a>
<span class="sourceLineNo">428</span>        }<a name="line.428"></a>
<span class="sourceLineNo">429</span><a name="line.429"></a>
<span class="sourceLineNo">430</span>        String r = "";<a name="line.430"></a>
<span class="sourceLineNo">431</span>        r += inputString.substring(0, i) + replaceString;<a name="line.431"></a>
<span class="sourceLineNo">432</span>        if (i + searchString.length() &lt; inputString.length()) {<a name="line.432"></a>
<span class="sourceLineNo">433</span>            r += searchReplace(inputString.substring(i + searchString.length()),<a name="line.433"></a>
<span class="sourceLineNo">434</span>                    searchString, replaceString);<a name="line.434"></a>
<span class="sourceLineNo">435</span>        }<a name="line.435"></a>
<span class="sourceLineNo">436</span><a name="line.436"></a>
<span class="sourceLineNo">437</span>        return r;<a name="line.437"></a>
<span class="sourceLineNo">438</span>    }<a name="line.438"></a>
<span class="sourceLineNo">439</span><a name="line.439"></a>
<span class="sourceLineNo">440</span>}<a name="line.440"></a>




























































</pre>
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